<html> <head> <base href="https://bugs.freedesktop.org/" /> </head> <body> <div> <a class="bz_bug_link bz_status_NEEDINFO " title="NEEDINFO --- - [IVB DP] Banded colors/reduced depth over Thunderbolt on Mac Mini Server 2012 (6,2)" href="https://bugs.freedesktop.org/show_bug.cgi?id=59113#c17">Comment # 17</a> on <a class="bz_bug_link bz_status_NEEDINFO " title="NEEDINFO --- - [IVB DP] Banded colors/reduced depth over Thunderbolt on Mac Mini Server 2012 (6,2)" href="https://bugs.freedesktop.org/show_bug.cgi?id=59113">bug 59113</a> from <a class="email" href="mailto:jason.heeris@gmail.com" title="Jason Heeris <jason.heeris@gmail.com>"> Jason Heeris</a> <pre>Aha! I found that issuing this command seems to fix the problem: $ sudo intel_reg_write 0x70008 0xC4002000 I found it here: <a href="http://ubuntuforums.org/showpost.php?p=12523426&postcount=3">http://ubuntuforums.org/showpost.php?p=12523426&postcount=3</a> ...which references <a class="bz_bug_link bz_status_ASSIGNED " title="ASSIGNED --- - [SNB] Full/Limited Color range not functional" href="show_bug.cgi?id=46800">bug #46800</a>: <a class="bz_bug_link bz_status_ASSIGNED " title="ASSIGNED --- - [SNB] Full/Limited Color range not functional" href="show_bug.cgi?id=46800">https://bugs.freedesktop.org/show_bug.cgi?id=46800</a> ...and this email: <a href="http://lists.freedesktop.org/archives/intel-gfx/2012-February/015395.html">http://lists.freedesktop.org/archives/intel-gfx/2012-February/015395.html</a> Hope that helps. I have no idea whether this is safe to do, though.</pre> </div> <hr> You are receiving this mail because: <ul> <li>You are the QA Contact for the bug.</li> </ul> </body> </html>